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Forces, movement, shape and momentum

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Question 21
a.

A student measures the weight of a heavy steel sphere as 80 N80\text{ N}80 N.

Name a piece of equipment she could use to measure the weight.

[1]
b.

State the equation relating weight, mass, and gravitational field strength (ggg).

[1]
c.

Calculate the mass of the steel sphere. (Take g=10 N/kgg = 10\text{ N/kg}g=10 N/kg)

[2]
d.

Describe how the student could find the density of the steel sphere. You should include details of any further measurements she would need to make.

[3]
e.

The steel sphere is fired horizontally from a launcher mounted on a toy trolley, as shown in the diagram below.

A toy trolley with a horizontal launch tube is initially at rest. When the steel sphere is fired from the tube to the right, indicated by an arrow labeled 'direction of sphere', the trolley recoils to the left, indicated by an arrow labeled 'direction of trolley'.

Using ideas about momentum, explain why the trolley moves in the opposite direction to the sphere.

[3]

Forces, movement, shape and momentum Questions

  1. IGCSE
  2. /Physics
  3. /Forces, movement, shape and momentum